Sewing machine



J. P. WEIS.

SEWING MACHINE.

ORIGINAL FILED OCT. 16. I914.

Dec. 19, 1922.

2 SHEETS-SHEET l.

1N VEN TOR.

JUMP Mm.

A TTORNEYS.

Dec. 19, 1922.

J. P. WEIS.

SEWING MACHINE.

ORIGINAL FILED OCT. 16. 1914.

2 SHEETS SHEET 2.

IN V EN TOR. John P W w.

A TTORNEYS.

Patented ec. 19, 1922.

[TED STATES PATENT OFFICE.

JOHN PETER WEIS, OF NYACK, NEW YORK, ASSIGNOR OF ONE-HALF TO METROPOLI- TAN SEWING MACHINE CORPORATION, 01 DOVER, DELAWARE, A CORPORATION OF DELAWARE.

SEWING MACHINE.

Original application filed October 16, 1914, Serial No. 867,005. Patent No. 1,348,526, dated August 8,

l 1920. Divided and this application filed January 2, 1919. Serial No. 269,276.

To all whom it may concern:

Be it known that I, JOHN PETER WEIS, a citizen of the United States, residing at Nyack, in the county of Rockland and State of New York, have invented certain new and useful Improvements in Sewing Machines, of which the following is a specification.

This invention relates to sewing machine heads and stitch-forming mechanism therein. Its objects are to produce a stitchforming mechanism capableof high speed carried in a head specially constructed for easy working assemblage with the stitchforming mechanism and itself adapted for high speed service.

In the accompanying drawings forming a part hereof,

Fig. 1 is a vertical central section of a sewing machine head embodying this invention; and Figs. 2, 3, 4, 5 and 6 are views of the pump and container.

The present application isv'a division of my application Serial No. 867,005, for sewing machine and cutting mechanism therefor, filed October 16, 1914, on which Letters Patent No. 1,348,526 were issued on August 3, 1920, and embraces subject-matter shown in said application and also in my application Serial No. 94,355, filed April 29, 1916,

for stop motion on which Letters Patent No. 1,352,333 were issued on September 7, 1920, and in my application Serial No. 94,354, filed April 29, 1916, for lubricating system and sewing machine construction on which Letters Patent No. 1,348,527 were issued on August 3, 1920, the two latter applications being divisions of my said application Serial No. 867,005.

In the drawings, the sewing machine head comprises an upper horn A, an under horn A, and a connecting trunk a, the horns and trunk having communicating chambers. The outer wall of the trunk comprises an inwardly projecting boss (1 in the inward end of which stop-motion members are arranged in operative relation to the rear end of the top or needle-bar drive-shaft. The upper side of the upper horn A is provided with a covered opening at a for access to the chamber of the trunk, and the outer end wall is provided with an opening a through Which the lubricant is poured into an oil container carried by a lower part of the trunk. The

rear wall of the trunk is also provided with a covered opening a into a lengthwise-extending chamber of the boss (1 for observation of the lubricant through the transparent cover a in the chamber of. the boss a, the rearward an oil space and the forward portion forming a housing. The topdrive-shaft and the looper shaft hereinafter described are both tubular and each is enclosed between its ends for the greater partof its length in tubes hereinafter described, which are centered and held in the lengthwise-extendin chambers of the horns by set-screws a t rough the horns and impinging on the outer surfaces of the tubes.

The oil reservoir 1 carried by the lower part of the trunk is supplied with oil through the'opening a, the oil being poured 7 into the drip-pan 2 which covers the top of the oil reservoir and also projects laterally thereof in the direction of and below the under horn A. The trnnk is open at a on its under side. The drip-pan is provided over the rearward side of the reservoir with a depressed perforated bottom portion forming an oil strainer 3. From the drip-pan the oil flows into a compartment 4 at the rearward side of the reservoir which is interiorly provided with parallel vertical walls 5 that are spaced apart, the space containing filtering material 6. The walls 5 are numerously perforated at 7 and the oil flows from compartment 4 throu h the perforations in the walls 5 and the fi tering material between them into the compartment 8 wherein an oil pump is located. The drippan has a vertically walled opening 9 through it for passage of a belt B that drives the pump and also drives the top or needle shaft of the'sewing machine. The induction tube 10 of the pump extends downwardl towards the bottom of compartment 8 an the eduction tube 11 extends upwardly from the pump througli'the chamber of the trunk to portion of such chamber forming conduct the pumped oil to the oil conduit 12 of its ends extended to receive. the driving pulley 16. The pump casing comprises a recessed block and a cover therefor. The block has an elongated recess 17 of a depth of the thickness of the gears which are the same thickness. The recess 17 has a length suflicient to receive the two gears when intermeshed. The block is provided with alined holes which lead from opposite sides of the recess 17. One hole is under and the other above the gears, for reception respectively of the pump induction and eduction tubes 10 and 11 which are alined with the intermeshing peripheries of the two gears. The outward face of the block has an annular recess 18 the botttom of which is flush with the outward surfaces of the intermeshing gears. The outward face of the block has another annular recess 19 concentric with, but of greater diameter than recess 18. The recess 19 is enclosed by the margins 20 of the outward face of the block which is indicated by 21. The cover is formed of a disk having on its inner face an annular projecting boss 22 of a diameter to fit into a recess the bottom of which is indicated by 18 with the inward face of the boss close up to the outward faces of the intermeshing gears. The cover is also provided with an annular flange 23 which fits into the recess 19 and is fixed air-tightly thereinto. .Boss 22 is provided on its inner face with bearing holes 24 which extend only partway through the boss 22 and which support, one an end of the gear shaft 15, and the other a trunnion of the gear 13*. These bearing holes 24 are blind holes for insurance of air-tightness of the pum The pump gears 13 and 13' are shown 11 size,

and so also is the entire pump structure in Figs. 2 and 6. It has been found in practice that a pint of oil can be passed through the sewing machine every three minutes by means of this pump which is practically efficient in keeping some oil-containing parts constantly lubricated by oil spray produced by either the centrifugal or vibrating forces of the high-speed parts.

The top drive-shaft 25 is bored throughout its length to form an oil conduit 26, the rearward end of this shaft projecting into the oil chamber 27 in the boss 11, such chamber being supplied from the eduction tube 11 through the conduit or port 12 in the upper side of the boss (U. The front end of the conduit 26 is plugged at 28. The front end of the top shaft has an exteriorly reduced portion 29 and in this portion its wall is drilled at 30 to form oil conduits leading from the conduit 26 and permitting the passage of oil therefrom to the front forms a housing 33 for the needle-driving crank 34 fixed on the projecting end of the shaft 25. At its rear end, shaft 25 is fixedly united to a tubular ball crank member 25 which forms a rearward prolongation of the top drive-shaft. The member 25 is formed with two ball cranks 35 which are each drilled tubular chamber of the member 25 to the bearings 38, one at the upper end of a connecting rod 39 and the'other at the upper end of a connecting rod 39. The tubular ball crank member 25 has its bore in alinement with the conduit 26 of the shaft 25 so that the conduit 26 extends from its front plug 28 rearwardly to the extreme outer end of such ball crankextension of the top drive-shaft. Said member 25 is a rearward prolongation of the top or needle drive shaft, and forms a tubular ball crank at 36 to form oil conduits fromthe lengthwise v member as stated; on it there is mounted,

within the chamber of the trunk, a top shaft drive member shown as a pulley 37 for the pump and top shaft driven belt, B. Said prolongation or member 25 also carries a stop motion mechanism 46 which forms the subject matter of my application Serial No. 94,355, filed April 29, 1916, as a division of my application Serial No. 867,005, filed October 16, 1914, The stop motion mechanism is also within the trunk chamber and encircles the member 25* and has structural portions located in an annular recess in the forward end of the boss at, the forward end of the tubular portion of the boss having its under wall recessed at 8". for entrance of a stop finger 64*.for the stop motion which, with other parts of a stop motion control lever indicated in part by 64 are also located within the chamber of the trunk. The oil chamber 27 of .the boss has an oil-escape port 83 and, the bore 84 of the member 25 communicates at its rear end with the chamber 27. The rear end of the bore in said extension opens into oil chamber 27 Surplus oil from the ball cranks 35 and the bearings 38 flows down the connecting rods 39 and 39 to the respective ball bearings 40 and 41 thereof at their lower ends. The wall of the conduit 26 within the enclosing end of its said rearward prolongation 25 is bored at 42 and the enclosing forward end of the member 25 is coincidently bored at 43 to form conduits from the conduit 26 to the rearward bearing 44 of the top drive-shaft 25, this rearward bearing being fixed in the rear end of the enclosing tube 32. The side wall of the front end of conduit 26 just rear- \vardly of the plug 28 is perforated at 45 exteriorly of the front bearing 31 and within the housing 33 to form an oilconduit leading from conduit 26 into an oil conduit 47 formed by drilling the needle-drivingy crank 34.

Conduit 47 discharges oil on the front advancing surface of the crank at one side of the crank pin 48 and such oil flows down the advancing surface of the rotating crank to and lubricates the crank pin in its bearing 49 which is formed in the upper end of the needle-driving link 50. Some of this oil flows out on the crank, and oing to the crank-pin bearing, is Whirled 01% by centrifugal force and caught within the housing 33; and other of the oil coming to the crank pin bearing flows down the needle link 50 to and lubricates the connection 51 of the needle link with the needle holder 53. This oil escaping at the connection 51 finds its way to the needle-holder guide-bar 54 and needle-holder ears-55 that reciprocate vertically in the groove 56 of the needle-holder guide 57. The oil passing through the conduit 17 is forced thereinto by centrifugal force and it is found in practice that the amount of oil finally coming to the needle holder and needle-holder guide is, while sufficient for lubrication purposes, negligible so' far as any deposit of oil on the goods is concerned.

The shank of the needle-holder guide 57 is formed with an oil conduit 58- which extends downwardly to near the bottom of the needle-holder guide-bar 54, the wall of conduit 58 being perforated at 59 to permit escape of oil to the outer surface of the needle-holder ide-bar.

The top-sha t-enclosing tube 32 at its forward end and lower portion has a transverse web 60, or in other words the housing 33 has such transverse web which forms a dam to hold back in the housing any oil if it drops to the bottom thereof. The front bearing 31 is formed on its under side with a lengthwise conduit 61 that conducts. oil rearwardly into the tube 32 from the bottom of the housing 33; and such oil flows rearwardly through the conduit 61 alongv the bottom of the tube 32 to oil-conduit 62 which is formed in the bottom of the rear ward bearing 44 of the top shaft.

The rear end of conduit 62' discharges within a housing or cap 63 which is open at its under side. This cap encloses the rearward end of the tube 32 and has at its rear end an o ening for reception of the flanged end 0 the ulley hereinafter described. The under si es of the housing or cap 63 are curved laterally inwards at 64 giving the housing 63 a trough shape along its bottom both lengthwise and transversely thereof. Oil flowing into the chamber of the housing from conduit 62 flows along the adjacent edges 65 thereof to the drip point 66 which is directly over a V- shaped oil-receiving space 67in the upper side of a bell crank 68 one arm of which terminates in a ball 41 working in the ball bearing 41, and the other arm of which terminates in a ball 69 which is entrant in the looper shaft. Oil so falling into the space or opening 67 oils the crank'of the bell crank journal and flows down the lower bell-crank arm to its end 69 which is within the rear end of the lengthwisechambered looper-shaft 70, the upper side of this looper shaft having a slot 70 through which the lower end of the lower arm of the bell crank extends. Oilcollecting in the chamber of the looper shaft at the lower end of the lower arm of the bell crank, flows forwardly throu h conduits 71 in the plug 72 which is sli able in the chamber of the looper-shaft just for wardly of the lower end 69 of the lower member of the bell crank. The oil flowing through these conduits 71 passes the coil spring 73 which is mounted between the the lower portion of which recessj78 a conduit 79 extends downwardly and rearwardly into the chamber of a tube 80 which encloses a reater part of the length of the looper sha t, and in the front endof' which the front bearing 77 of the looper shaft is fixed. The rear bearing 77 of the looper shaft is fixed in the rear end of thetube 80 which is centered in the chamber of the lower horn A by set-screws a. similarly to the centering and fixing of the enclosing tube 32 for the top drive-shaft. The rear bearing77 is rov'ided with a rearwardly and downwar ly inclined conduit 81 which discharges into the forwardly projecting portion of the drip-pan, the bottom of which is inclined rearwardly to the oil strainer 3. The looper shaft has ciprocation' of this connecting rod 39,

means of the bell crank, the movable plug 72, the spring 73, and the fixed plug 74," secures endwise reciprocation to the looper shaft in its front and rear bearings 77, the

iso

forward movement of the looper shaft being against theresistance of the spring 73 which is a mere take-up spring for wear on the plugs 72 and 82 and the ball 69. Spring 73 is under heavy tension and the reciprocation of the looper shaft is positive in. each direction. The ball connections formed by the ball cranks and their bearings 38 and by the bearings 43 and 41 and the balls 40 and 41 and by the ball 69, secure easy actuation of the connecting rods 39 and 39 for the rocking and endwise reciprocatory movements of the looper shaft.

What I claim is:

1. A sewing-machine head having a chambered trunk, and lengthwise chambered upper and under arms: a hollow tube in each arm; means for hicating and holding the tubein each arm; aneedle drive shaft in the'tnbe' in the upper arm; a looper shaftin the tube in the under arm: and, in thechamber of the trunk mechanism for driving the drive. shaft and other mechanism for rocking and giving endwise reciprocation to the looper shaft.

2. In the structure of claim 1. the bearings for the drive shaft being mounted in the upper arm tube and the bearings for the looper shaft being mounted in the under arm'tube.

3. In the structure of claim 1, the mechanism for actuating the looper shaft comprising a pivoted bell crank operatively connected at one end with the looper shaft: a crank rod operatively connected at its other end to a crank on the drive shaft: and a connecting rod operativelyconnected at one end to a crank on the drive shaft and at its other end to a crank on the looper shaft.

4. In the structure of claim 1. the trunk chamber having a rear end bearing for the drive shaft and the drive shaft having its rear end journaled in said bearing; and a p0wer-driving device on the drive shaft between said bearing and the rear end of the upper arm tube.

5. In the structure of claim 1. the trunk chamber having a rear end bearing for the drive shaft and the drive shaft having its rear end journaled in said bearing; and a power driving device on the drive shaft between said bearing and the rear end of the upper arm tube; the rear end of the upper arm tube and said power driving device being spaced apart; the drive shaft having two adjacent crank members in said space; and a connecting rod for each of said members for rocking and reciprocating connection with the looper shaft.

6. In a sewing machine. the combination of a needle. driveshaft provided with a pair of ball cranksz'a looper shaft provided with a ball crank-and with a lengthwise-extending slot; a connecting rod between one ball which said under-end of the lever abuts: a

spring in said chamber against which the plug abuts. and an abutment for the spring.

7. A sewing machine head comprising, in combination, a lengthwise chambered upper arm and a lengthwise chambered under arm said arms being connected by a vertical chambered trunk; a lengthwise extending tubular, top drive shaft support provided with bearings for the drive shaft; atop drive shaft journaled in the bearings; means for adjustably positioning said tubular support in the chamber of the upper arm spacedly apart from the wall of the chamber: a lengtlnvise extending under. tubular, looper shaft support provided with bearings for a looper shaft: means for adjustably positioning the. under tubular support in the chamber of the under arm spacedly apart from the wall of such chamber: a looper shaft journaled in the hearings in the under tubular support; and looper actuating mechanism operatively connecting the drive shaft with the looper shaft.

8. A sewing machine head comprising. in combination. a lengthwise chambered upper arm aml a lengthwise chambered under arm. said arms being connected by a vertical chambered trunk: a lengthwise extending. tubular. top drive shaft support provided with bearings for the drive shaft: a top drive shaft journaled in the bearings: means for adjustably positioning said tubular support in the chamber of the upper arm spacedly apart from the wall of the chamber: a lengthwise extending under. tubular. looper shaft support provided with bearings for a looper shaft: means for adjustably positioning the under tubular support in the chamber of the under arm spacedly apart from the wall of such chamber: a looper shaft journaled in the hearings in the under tubular support: and looper shaft actuating mechanism operatively connecting the drive shaft with the looper shaft: the top drive shaft and the looper shaft actuating mechanism connected with the top drive shaft being located within the chamber of the trunk, and the looper actuating mechanism comprising means to give the looper shaft both a rocking movement and an endwise reciprocating movement.

9. In the structure of claim 1. the mechanism for actuating the looper shaft comprising a pivoted bell crank operatively connected at one end with the looper shaft; a crank rod operatively connected at its power driver for the pump, such driver being located under said power driving depump driver.

vice; and a beltfrom the shaft driver to the 11. In the structure of claim 1, the trunk chamber having a rear end bearing for the drive shaft and the drive shaft having its rear end journaled in said bearing; and a power driving device on the drive shaft between said bearing and the rear end of the upper arm tube; said bearing being mounted in a horizontally chambered boss carried by the trunk, the bearing extending from the front end of the chamber of the boss part way to its rear end, leaving a chamber between the bearing and the rear wall of the trunk; the wall of such chamber being orificed for reception of an oil conduit; and the wall of the boss opposed to the bearing together with the bearing being recessed for reception of stop-motion members; and such members.

12. In the structure of claim 1, the trunk chamber having a rear end bearing for the.

drive shaft and the drive shaft having its rear end journaled in said bearing; and a power driving device on the drive shaft between said bearing. and the rear end of the upper arm tube; said bearing being-mounted in a horizontally chambered boss carried by the trunk. the bearing extending from the front end of the chamber of the boss part way to its rear end. leaving a chamber between the bearing and the rear wall of the trunk; the wall of such chamber being orificed for reception of an oil conduit; and the wall of the boss opposed to the bearing together with the bearing being recessed for reception of stop-motion members; and such members; said chambered boss having a rear end flange. and the trunk wall having an opening for reception and fi'xture of the flanged boss.

13. In the structure of claim 1, the trunk chamber having a rear end bearing for the drive shaft and the drive shaft having its rear end journaled in said bearing; and a power driving device on the drive shaft between said bearing and the rear end of the upper arm tube; said bearing being mounted in a horizontally chambered boss carried by the trunk. the bearing extending from the front end of the chamber of the boss part way to its rear end, leaving a. chamber bet-ween the bearing and the rear wall of the trunk; the wall of such chamber being orificed for reception of an oil conduit; and the all of the boss opposed to the bearing together with the bearing being recessed for reception of stop-motion members; and such members; the pump shaft being parallel with the drive shaft; the alined drivers being at right angles to the drive and pump shafts; and the pump shaft having a fixed spur gear in mesh with a spur gear carried within the container on a shaft parallel with the pump shaft.

In testimonywhereof I have hereunto set my hand this 27th day of December, 1918.

JOHN PETER \VEIS. 

